Last updated: August 31, 2025
Experience the vibrant weather of Cabo Rojo, Puerto Rico, in September, where temperatures primarily hover around a comfortable 28°C (82°F), with maximum highs reaching 30°C (86°F) and minimum lows at 25°C (77°F). This tropical paradise witnesses an average precipitation amount of 122 mm (4.8 in) across approximately 18 days, contributing to the lush scenery that the region is known for. With humidity levels around 79%, visitors can expect a warm and inviting atmosphere perfect for exploring the stunning coastline and natural beauty of Cabo Rojo.
In Cabo Rojo, Puerto Rico, September's temperatures reflect the warm, tropical climate typical of the region, with minimums averaging around 25°C (77°F) and maximums reaching up to 30°C (86°F). The average temperature settles comfortably at 28°C (82°F), maintaining a consistent warmth that encourages outdoor adventures. As summer transitions into fall, September's weather aligns closely with the patterns observed in the preceding months of July and August, showcasing only slight variations in temperature. This lovely coastal town remains a favorite destination for sunseekers, as its balmy weather continues to offer inviting beach days and enjoyable evenings under the stars.
September marks a significant shift in precipitation patterns for Cabo Rojo, Puerto Rico, as the region experiences its wettest month of the year, receiving an impressive 122 mm (4.8 in) of rain over 18 days. This sharp increase from the summer months, which typically see around 70 mm in August, underlines the transition into the rainy season. The heightened rainfall not only elevates the overall annual total but also highlights a trend of increasing moisture, as the dry spell of winter months approaches. With nearly double the precipitation of August, September clearly plays a pivotal role in the region’s hydrological cycle, paving the way for lush greenery and vibrant landscapes in the months that follow.
In Cabo Rojo, Puerto Rico, September ushers in a humidity level of 79%, marking a subtle dip from the peak summer months of July and August, which boast humidity levels of 81% and 80%, respectively. This seasonal trend highlights a gradual shift as the summer heat begins to wane, leading into the softer, yet still comfortably humid, months of autumn. Throughout the year, humidity in Cabo Rojo remains relatively consistent, with minor fluctuations; January to May consistently hover around 75% to 76%, before rising to a peak in July. As September transitions into October, you can expect a slight reduction to 78%, suggesting that while the air remains humid, the intensity of the summer's grasp is easing, paving the way for a more temperate autumn experience.
As September settles in Cabo Rojo, Puerto Rico, residents and visitors can expect a consistent UV Index of 13, categorizing the sun exposure as extreme. This trend aligns with the peak of the summer months, where the burn time remains a swift 10 minutes. From January through August, the UV levels show a marked increase, peaking in May before stabilizing through the early fall. As October approaches, the UV Index slightly declines to 12, yet continues to demand caution. Those enjoying the sunny shores of Cabo Rojo should remain vigilant and well-prepared to protect their skin. For more details on the UV Index throughout the year, check out Cabo Rojo UV Index.
UV Risk Categories
As the summer heat starts to wane, September brings a delightful blend of warmth and sunshine to Cabo Rojo, Puerto Rico. With 318 hours of sun-soaked bliss, this month marks a gentle dip from the peak sunshine of earlier months, yet it still maintains a vibrant golden glow. Following the sunniest months of May and July, September offers a comfortable transition into fall, where locals and visitors alike can enjoy outdoor activities under the warm sun without the extreme heat of midsummer. This consistent number of sunshine hours hints at Cabo Rojo's inviting climate, making it an ideal getaway even as the year approaches its end.
In September, Cabo Rojo, Puerto Rico, enjoys a sunshine likelihood of 60%, making it a delightful time for those seeking warm, sunny days. This percentage reflects a slight rebound from the summer months, where sunshine chances decline to around 34% in June and linger near 50% through August. As the year progresses, the likelihood of sunny weather picks up again, with a notable increase to 65% in November. Overall, September sits comfortably in the middle of the spectrum, offering a promising balance of sun and warmth, perfect for beachgoers and outdoor enthusiasts alike.
In Cabo Rojo, Puerto Rico, September marks a transition in daylight hours, maintaining a consistent 12 hours of sunlight that has characterized the summer months. As the year progresses from the long, bright days of June and July, which each enjoy 13 hours of daylight, September represents a gentle shift towards the cooler fall months. Following this, daylight begins to wane in October, decreasing back to 11 hours. This rhythmic cycle not only showcases the island's tropical charm but also highlights the gradual changes that accompany the transition from summer to autumn, enhancing the natural beauty and vibrant culture of Cabo Rojo during this time.
September in Cabo Rojo, Puerto Rico, brings a gentle shift in the winds, with an average speed of 3.7 m/s (8 mph), making it one of the calmest months of the year. Following the summer months, which witness wind speeds peaking in July at 5.3 m/s (12 mph), September embraces a serene ambiance as the winds begin to ease. The transition from the lively gusts of summer to the more tranquil September breezes invites visitors to enjoy the stunning coastal views and warm sunshine without the usual bluster. This notable decrease in wind speed continues a trend from the previous months, where the most consistent winds are experienced from June to August. As the month winds down, October will see a slight uptick in wind speeds, but for now, September serves as a perfect time for those looking to bask in calmer skies and soothing sea breezes.
Weather in Cabo Rojo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cabo Rojo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, September tends to be warmer and significantly wetter. With average temperatures reaching up to 28°C (82°F) and total precipitation of 122 mm (4.8 in) over 18 days, September exhibits high humidity levels at 79%. In contrast, January is milder, with an average temperature of 26°C (78°F) and much less rainfall, totaling only 15 mm (0.6 in) over just 3 days. The humidity drops slightly to 76%. For more detailed information about January weather specifics, visit Cabo Rojo weather in January.
September and February present distinct weather patterns in Cabo Rojo. September typically boasts warmer temperatures, with minimums around 25°C (77°F) and averages reaching 28°C (82°F), while February experiences slightly cooler temperatures, with a minimum of 23°C (73°F) and an average of 25°C (78°F). Additionally, September is notably wetter, receiving 122 mm (4.8 in) of precipitation over 18 days, compared to February's much drier conditions with just 17 mm (0.7 in) expected over 6 days. Humidity levels are also relatively high in both months, though September tends to be slightly more humid at 79% compared to February's 75%. For a more detailed look at the weather specifics, you can check Cabo Rojo weather in February.
September and March exhibit distinct weather patterns, making them unique months in terms of climate. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), with an average temperature of 28°C (82°F). However, this month experiences significant rainfall, totaling 122 mm (4.8 in) over approximately 18 days, coupled with high humidity at 79%. In contrast, March is slightly cooler, with temperatures varying from 23°C (73°F) to 28°C (82°F) and an average of 25°C (78°F). The precipitation in March is minimal, at only 30 mm (1.2 in) over about 7 days, and the humidity is a bit lower at 75%. For a more detailed look at the weather patterns, you can check out Cabo Rojo weather in March.
When comparing the weather in September and April, September tends to be warmer and wetter. With average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), September's average temperature is higher at 28°C (82°F), compared to April's average of 26°C (79°F). Additionally, September experiences significantly more rainfall, with 122 mm (4.8 in) of precipitation over 18 days, while April sees only 30 mm (1.2 in) of precipitation over 8 days. Despite this, both months maintain a relatively high humidity level, with September at 79% and April slightly lower at 76%. For a closer look at April's climate, you can check Cabo Rojo weather in April.
In comparing the weather between September and May, September tends to be warmer and wetter. With average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), it showcases a slightly higher average of 28°C (82°F) compared to May's 27°C (80°F). However, September also experiences significantly more rainfall, with 122 mm (4.8 in) of precipitation over 18 days, in stark contrast to May's lighter rainfall of just 33 mm (1.3 in) over 7 days. Furthermore, humidity levels are a bit higher in September at 79%, compared to May's 76%. For a more detailed look at the weather in May, you can refer to Cabo Rojo weather in May.
In Cabo Rojo, June and September share similar temperature ranges, with both months featuring a minimum of 25°C (77°F) and maximum temperatures peaking at 30°C (86°F). However, September tends to be slightly warmer on average, at 28°C (82°F), compared to June's average of 27°C (81°F). A significant difference between the two months is the amount of rainfall; September experiences much heavier precipitation with 122 mm (4.8 in) over 18 days, while June only sees 31 mm (1.2 in) across 9 days. Additionally, humidity levels are fairly consistent, with September at 79% and June at 78%. For more detailed information, you can check Cabo Rojo weather in June.
When comparing the weather in September and July, we find both months share similar average temperatures, with a minimum of around 25°C (77°F) and a maximum reaching up to 30°C (86°F). However, July tends to be slightly less humid at 81% compared to September's higher humidity levels of 79%. A notable difference lies in the rainfall; September experiences significantly higher precipitation, totaling 122 mm (4.8 in) over 18 days, while July sees just 63 mm (2.5 in) across 12 days. This makes July a drier option for those looking to enjoy the outdoor activities in Cabo Rojo. For more details, check out Cabo Rojo weather in July.
In comparing the weather between September and August, we observe that both months share similar temperature ranges, with minimums at 25°C (77°F), average highs around 28°C (82°F-83°F), and maximums reaching 30°C (86°F). However, September experiences significantly more rainfall, totaling 122 mm (4.8 in) over 18 days, as opposed to August, which sees only 70 mm (2.8 in) over 13 days. Additionally, humidity remains relatively high in both months, with September at 79% and August slightly higher at 80%. For more detailed insights on August's weather patterns, you can visit Cabo Rojo weather in August.
September and October exhibit quite similar temperature profiles, with both months featuring minimums of 25°C (77°F), average highs of 28°C (82°F), and maximums reaching 30°C (86°F). However, October sees a notable decrease in precipitation, with only 74 mm (2.9 in) compared to September's 122 mm (4.8 in), and fewer rainy days, down to 16 from September's 18. Humidity levels also remain relatively stable, with October at 78%, slightly lower than September's 79%. For a more detailed overview of October's weather, check out Cabo Rojo weather in October.
In comparing the weather of September and November, September tends to be slightly warmer, with an average temperature of 28°C (82°F) compared to November's average of 27°C (81°F). Both months maintain a minimum temperature of 25°C (77°F) and show a reduction in maximum temperatures as November reaches a peak of 29°C (85°F) versus September's 30°C (86°F). Precipitation also decreases significantly from September's 122 mm (4.8 in) over 18 days to November's 75 mm (3.0 in) over just 13 days, contributing to a drier climate. Humidity levels remain comparable, with September at 79% and November slightly lower at 78%. For more detailed insights, you can check Cabo Rojo weather in November.
In September, the weather is notably warmer with average temperatures around 28°C (82°F) and maximums reaching 30°C (86°F). This month experiences higher humidity at 79% and significantly more rainfall, with 122 mm (4.8 in) over about 18 days. In contrast, December presents a milder climate, with average temperatures dropping to 26°C (80°F) and maximum temperatures peaking at 29°C (84°F). The precipitation is considerably reduced to just 21 mm (0.8 in) over 3 days, and humidity levels slightly decrease to 77%. For more detailed information, you can check Cabo Rojo weather in December.
As September rolls into Cabo Rojo, visitors experience a notable shift in weather patterns, characterized by warmer temperatures and increased rainfall compared to the drier summer months. The average temperature hovers around a comfortable 28°C (82°F), which feels inviting but is accompanied by nearly two-thirds of the month witnessing rainfall, adding to the island's lush beauty. Humidity levels soar to around 79%, making it essential to stay hydrated and enjoy the refreshing sea breeze that accompanies the occasional downpour. This month serves as a transitional period, setting the stage for the vibrant fall scenery of Cabo Rojo. For a deeper dive into the region’s atmospheric trends, visit Cabo Rojo Climate.